CVE-2025-15555: Open5GS VoLTE Cx-Test hss-cx-path.c hss_ogs_diam_cx_mar_cb stack-based overflow

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-04 · updated 2026-06-17
Weakness: CWE-119

Description

A security flaw has been discovered in Open5GS up to 2.7.6. Affected by this vulnerability is the function hss_ogs_diam_cx_mar_cb of the file src/hss/hss-cx-path.c of the component VoLTE Cx-Test. The manipulation of the argument OGS_KEY_LEN results in stack-based buffer overflow. The attack may be launched remotely. The patch is identified as 54dda041211098730221d0ae20a2f9f9173e7a21. A patch should be applied to remediate this issue.

Affected products

Open5GS: through 2.7.6

References

https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/commit/54dda041211098730221d0ae20a2f9f9173e7a21
https://github.com/open5gs/open5gs/issues/4177
https://github.com/open5gs/open5gs/issues/4177#event-21256395700
https://vuldb.com/submit/741901
https://vuldb.com/vuln/343795
https://vuldb.com/vuln/343795/cti
https://github.com/open5gs/open5gs/issues/4177#event-21256395700

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